Yeo is a surname.

Yeo or YEO may also refer to:

• River Yeo (disambiguation), several rivers in Somerset and Devon, England
• Yeo Valley Organic, a dairy business based close to one of the Yeo rivers in Somerset, England
• "Yeo Valley Rap", a song from an advertisement by Yeo Valley Organic that entered the UK music charts in 2010
• Yeo Island, British Columbia, Canada
• IATA airport code for RNAS Yeovilton (HMS Heron), a Royal Navy airfield
• Yeo Hiap Seng, an investment holding company commonly known as Yeo's
• YEO (Young Entrepreneurs' Organization), original name for the non-profit Entrepreneurs' Organization
• Yeo (locomotive), a British narrow gauge railway locomotive built in 1897

• Bi Abr
• Bi Abr-e Choqamaran
• Bia (butterfly)
• Bi Ab, Zanjan
• Bia capivarensis
• Biachal
• Biachini Crater
• Bia cordata
• Biada language
• Biadan
• Biadeh
• Bia (deity)
• Biadmuin
• Bia East District
• BIAF
• Biafada
• Biafada language
• Biafada people
• BIAF Airshow
• Biafara people
• Bia Figueiredo
• Biafra concinnella
• Biafra (moth)
• Biafran airlift
• Biafrans